Sea water thermometer



' July 28, 1936. F, G WILLIAMS 2,048,720

SEA WATER THERMOMETER Filed Sept. 12, 1933 INvENTo Patented July 28, 1936 UNI TE 1): STAT EST:

2,048,720 SEA WATER THERMOMETER Franklin G. Williams, Washington, D. 0.

Application September 12, 1933, Serial No. 689,118

1 Claim.

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) This invention relates to a sea water thermometer and has for an object to provide an improved sea water thermometer especially adapted for obtaining sea water temperature readings at any desired depth.

A further object of this invention is to provide a thermometer holding case which will expose the thermometer to the temperature of the sea at the lowermost depth.

A further object of this invention is to provide an improved holding case for a sea water thermometer which will allow the sea water to gain access to the thermometer as it is being lowered and which when the lofermost depth is reached will retain the sea water that has entered the holder at that depth within the case as it is withdrawn.

A further object of this invention is to provide a sea water thermometer holding case which will have an opening valve. that will permit the sea water to gain access to the thermometer as it is being lowered and that will close as the thermometer is raised to prevent any change therein.

With the above and other objects in View the invention consists in the construction, combination and arrangement of parts as will be described more fully hereinafter.

Reference is to be had to the accompanying drawing forming a part of this specification in which like reference characters indicate corresponding parts throughout the several views, and in which:

Fig. l is a front plan view of the sea water thermometer in reading position;

Fig. 2 is a side view of Fig. l, the bottom of the thermometer case being partly broken away;

Fig. 3 is a perspective view of the valve shown at the bottom of Fig. 2; and

Fig. 4 is an elevational View of a removable cap.

from the thermometer.

There is shown at ID the sea Water thermometer constituting this invention. This sea water thermometer comprises a thermometer II which is mounted within a tubular shaped holding member l2 of heavy gauge metal as shown, the tubular holding member l2 having a window opening l3 therein, permitting the graduations I4 on the thermometer I I to be readable therethrough. The thermometer I l is mounted in the holder E2 by means of stud screws l5 passing therethrough. The bottom of the thermometer H projects into a well I6 formed in the bottom of the holder 12. Projecting through the bottom of the well I6 is a valve seat I"! in which is mounted a poppet valve I 8 for vertical opening movements, the upward movement of the poppet valve l8 being limited by the pin l9 extending through the holder I2.

A conical perforated cap 26 has a pair of bayonet pins 2i which cooperate with bayonet joint- 5 ed slots 22 on the top of the holder I2, the pins 2| projecting from an internal flange 23 whereby the cap 26 may be securely mounted on top of the holder I2. A strap 24 secured to the holder I2 by means of stud screws 25 has an eye 26 formed therein, providing means for receiving the end of a lowering cable.

In operation the sea water thermometer I0 is secured by means of eye 26 to a suitable lowering cable, and the thermometer is then lowered into the water to the desired depth. As the thermometer I0 is lowered through the water the poppet valve !8 rises to the position l8 allowing the sea water to enter into the well It and circulate through the holder and out through the perforations 21 in the conical cap 20. When the thermometer it has been lowered to the desired depth, it will be held stationary a moment thereby permitting the poppet valve IS to return to the closed position, thus entrapping the sea water in the well it. The thermometer is then quickly raised, the closed poppet valve I8 then preventing the circulation of any water through the thermometer and entrapping the sample of sea water in the well I6, thereby keeping the thermometer II at the same reading as it had at the desired depth. The thermometer on being raised will then be read and the temperature recorded in the usual manner.

It will be understood that the above description and accompanying drawing comprehend only the general and preferred embodiment of this invention, and that various changes in construction, proportion and arrangement of parts may be made within the scope of the appended claims, and without sacrificing any of theadvantages of this invention.

The herein described invention may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

I claim:

A sea water thermometer adaptable to be suspended from a moving ship to penetrate the sea 50 to great depths and register temperature at the lowermost depth, comprising a weighty tubular holding member of heavy gauge metal, a thermometer firmly and protectedly secured within said tubular member, a closure member on the 55 bottom of said'tubular member, a valve seat 7 member extending through said closure member,

an upwardly-openable closure member comprising a poppet valve seatable on saidvalve seat member, a pin extending transversely of said tubular member limiting the upward movement of said poppet valve, a vertical window in said tubular member disposed opposite said thermometer; a detachable apertured top closure member secured to said tubular member, an apertured metal strap secured to said tubular member adapted to receive a. lowering cable wherebysaid, I

sea water thermometer may be lowered to a great depth and permit circulation of the sea'up through the open poppet valve and out through the apertured top as the thermometer'is being lowered and to entrap said seawater at the lowermost depth reached, so as to maintain the ther- 'mometer at the temperature of the lowermost depth so that it may be raised and read.

FRANKLIN G. WILLIAMS. 1c 

